clock ssm

Function

The clock ssm command configures an SSM level for a line clock source.

The undo clock ssm command deletes the SSM level configured for a line clock source.

By default, the SSM level of a line clock source is transmitted from the peer device.

Format

clock ssm { unk | prc | ssua | ssub | sec | dnu | prtc | eprtc | esec | eprc }

undo clock ssm

Parameters

Parameter	Description	Value
unk	Indicates that the SSM level is unknown clock synchronization quality.	-
prc	Indicates that the SSM level is PRC (G.811 clock signal).	-
ssua	Indicates that the SSM level is SSUA (G.812 transit node clock signal).	-
ssub	Indicates that the SSM level is SSUB (G.812 local node clock signal).	-
sec	Indicates that the SSM level is SEC.	-
dnu	Indicates that the SSM level is not used for clock synchronization.	-
prtc	Indicates that the SSM level is PRTC (G.8272 clock signal).	-
eprtc	Indicates that the SSM level is EPRTC (G.8272.1 clock signal).	-
esec	Indicates that the SSM level is ESEC (G.8262.1 clock signal).	-
eprc	Indicates that the SSM level is EPRC (G.811.1 clock signal).	-

Views

100GE interface view, 10G LAN interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE interface view, FlexE-100G interface view, FlexE-400G interface view, FlexE-50G interface view, GE optical interface view, GE electrical interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
clksync	write

Usage Guidelines

Usage Scenario

A synchronization status message (SSM) transmits the quality level of timing signals on a synchronous timing link. Node clocks on a synchronization network parse the SSM to obtain the quality level of an upstream clock.

If SSM levels are configured to participate in clock source selection, the system selects a clock source to be traced based on the SSM levels of clock sources. By default, the SSM level of a line clock source is transmitted from the peer device. You can manually configure an SSM level for the line clock source.

This command is supported only by the admin VS.

Example

# Set the SSM level of the clock source on GigabitEthernet 0/1/0 to PRC.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/0
[~HUAWEI-GigabitEthernet0/1/0] clock ssm prc